这是 SPI 的正确方法吗？

Question

我目前正在尝试检查该功能，看看我的 SPI 是否正常工作。这个函数应该 return 1，如果一切正常...但它总是 return 0。也许 pTxData 中的值是错误的？

uint8_t Gyro_CanReadWHOAMI() {
    uint8_t pTxData[2] = {0x0F | 0x80, 0};
    uint8_t pRxData[2] = {0, 0};
    
    HAL_GPIO_WritePin(NCS_MEMS_SPI_GPIO_Port, NCS_MEMS_SPI_Pin, GPIO_PIN_RESET);
    HAL_SPI_TransmitReceive(&hspi5, pTxData, pRxData, 2, HAL_MAX_DELAY);
    
    HAL_GPIO_WritePin(NCS_MEMS_SPI_GPIO_Port, NCS_MEMS_SPI_Pin, GPIO_PIN_SET);
    uint8_t test = pRxData[1] == 0x32;
    return test;
}

int main(void)
{
  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();
  SystemClock_Config();
  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_SPI5_Init();

  uint32_t reads = 0;

  while (1)
  {
      Gyro_CanReadWHOAMI();
  }

}

使用STM32F429I-DISC1

Answer 1

已解决，错误的值

uint8_t Gyro_CanReadWHOAMI() {

      uint8_t pTxData[2] = {0b10000000 | 0x0F, 0};

      uint8_t pRxData[2] = {0, 0};

      HAL_GPIO_WritePin(NCS_MEMS_SPI_GPIO_Port, NCS_MEMS_SPI_Pin, GPIO_PIN_RESET);
      HAL_SPI_TransmitReceive(&hspi5, pTxData, pRxData, 2, HAL_MAX_DELAY);

      HAL_GPIO_WritePin(NCS_MEMS_SPI_GPIO_Port, NCS_MEMS_SPI_Pin, GPIO_PIN_SET);
      uint8_t test = pRxData[1] == 0xD4;
      return test;

}

这是 SPI 的正确方法吗？

Is this the right way to SPI?

stm32

stm32f4discovery